Recently Updated Extensions
ThreadKey Requires Restart
Strike the 'T' key to sort messages by thread, strike the 'U' key to sort them unthreaded again, just like the 'G' key switches to Grouped By Sort view.
Year view Requires Restart
Year view for calendar.
CardBook Requires Restart Featured
A new Thunderbird address book based on the CardDAV and vCard standards.
Shrunked Image Resizer Requires Restart
Make your photos smaller, so they don't take forever to email.
Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird
Teamworkx Thunderbird Integration for Jira Requires Restart
This is a add-on for Thunderbird 60+/Seamonkey 2.x which is able to create Atlassian Jira issues out of e-mails or add the content of an e-mail as a comment on an Jira issue.
Mail Merge Requires Restart Featured
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
Quicktext Requires Restart
Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
Send Later Requires Restart
True "Send Later" functionality to schedule the time for sending an email.
Menu On Top (SuperMenu Avatar) Requires Restart
Move the Thunderbird menu bar to the top. Choose from a selection of visual styles + colors. Add frequently used bookmarks and an avatar icon without wasting precious screen space. Bookmark your favorite sites, emails, folders or configuration pages.
quickFilters Requires Restart
Quickly generate mail filters on the fly, by dragging and dropping mails and analyzing their attributes. Create a filter in less than 10 seconds, it's as easy as: drag, click, click.
By popular demand, supports SORTING filters alphabetically.
QuickFolders (Tabbed Folders) Requires Restart
The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.
See new mail at a glance after automatic filtering - supports quickFilters addon!
Exit Button Thunderbird Requires Restart
Adds a toolbar button to exit Thunderbird. Go to View menu, Toolbars, Customize... and drag the icon where you want...
Rise of the Tools Requires Restart
Moves the toolbar back above the tabbar.
LightningButton Requires Restart
Toolbar-Buttons for Lightning; advances the feature to get rid of the tabbar.
Phoenity Buttons Requires Restart
Adds some toolbar buttons using phoenity icons.
Displays message headers more compact (2 lines).
Get/Send Button Requires Restart
Extends the original "Get" button (optionally) to "Get/Send" and adds a popup menu with additional functions.
You may want to use it together with the following Add-ons:
* Send Later Button (by me / Alexander Ihrig)
* Send Later (by jikamens)
gContactSync Requires Restart
Synchronizes contacts & groups between Thunderbird and Google Contacts.
Delete Trash Button Requires Restart
Adds an Empty Deleted button to the Toolbar
Easiest way to change your Facebook background. More than 100+ free background image available.